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The no of ways of arranging 15 student loans a1 a2 upto a15 in a row such that neither A2 nor A3 be seated before A1is

Harshit mangla , 7 Years ago
Grade 11
anser 1 Answers
Saurabh Koranglekar

Last Activity: 4 Years ago

Dear student

Total arrangement methods 15!
Now find total arrangements in which a1 or a2 are seated before a1

subtract the answer obtained from total arrangements

Regards

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